Fuel economizer



Jan. 29, 1929. 1,700,411

Y Y R. P. KING FUEL ECONOMI ZE R Filed April 9, 1927 I 2 Sheets-Sheet. 2

mommy Patenteddan. 29,1929. 1,700,411

-UNI'TED STATES PATENT-OFFICE.

ROBERT PARSONS KING, OF ELLSWORTH, MAINE, ASSIGNOR TO FBEEFUEL HEATER COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.

FUEL noonomrznn.

Application filed April 9, 1927. Serial No. 182,315.

- The ordinary heater, whether steam, hot for indefinite enlargement by'simply adding water, vapor or hot air, is of low etiiclency or removing heater plates. 'In its adaptation as compared with the inherent possibilities to steam heaters, my design avoids the necesfor maximum heating efiect. This is due sity for a common steam chamber or dome for 5 mainly to the fact that most of the hot gases the unit in that with my heater that portion and products of combustion are allowed to of each individual section above the water escape along the flue connection without deline functions as a steam dome itself. This livering up their full heating values. This results in a desirable flexibility of the units waste is particularly true of those heaters by eliminating the necessity for manufac- N which are equipped with oil burner units turing the units in various sizes to meet vary- 65 which require an increased draft, the effect ing conditions.

' of which is to blow the hot gases through the For the purposes of this application, I have flue connection before they have had an opillustrated in the accompanying drawings my portunity of delivering up their full heating economizer applied to both hot water and 1 effect; steam heating plants of conventional type. 70

' Various economizers have been devised for In the drawings: utilizing the waste heat passing through the Fig. 1 shows my economizer mounted in the flue connection, but in general such prior conflue connection of a hot water boiler. structions have been expensive of design and Fig. 2 shows the installation for a steam 2 installation and have not been adaptable inboiler, and T5 terchangeably to the various types of heat Fig. 3 is a side elevation of the heating plants. -This has required that the econounit shown in Fig. 1, the casing being in secmizers be made in various sizes for different tion. Fig. 4 is an end elevation of Fig. 3, installations and in various types for differthe casing being in section. Fig. 5 is a plan ent types of heating plants. view of Fig. 3, the casing being in section 80 In general, also, such prior art construcand the several water pockets being each partions have all involved the interposition of a tially broken away. Fig. 6 is a detail view steam-coil or radiator in or ad acent to'the particularly illustrati'n the interfacial conflue connection. This necessitates the service nection of the indivi ual water pockets of a steam fitter in installing the economizer,. shown in Figs. 3, 4, and 5. Fig. 7 is a sec- 85 and the physical resence of the steam coil tion of the heater unit shown in Fig. 1 andor radiator .in the ue connection itself tends particularly illustrating the passage of the to obstruct the free passage of the soot and products of combustion therethrough. Fig. smoke through the flue. .8 is a view similar to Fig- 7 of the'heater To the end, therefore, of avoiding these unit illustrated in Fig.2, and Fig. 9 is a 9 objections while at the sa'me'time providing plan of Fig. 8.

a heater which will be suflicient in design and Referring to Fig. 1, I have indicated at 1 Y operation and inexpensive to install, I have a hot water boiler of conventional type, an devised my present invention. According to at 2 the flue connection to the chimney.

40 it, the heater unit is constructed as a cham- Interpo'sed within the flue connection at .95 her disposed about the flue and enclosing a any selected pointbetween the boiler and the plurali of fiat plates or water pockets dischimney is a chamber 3 having connection at posed in spaced parallel relation to each other 4 with .the water compartment of the hot and interfacially connected to each other.. water heater and at 5 having a return connec- By this construction, I not only avoid any t1on eitherthereto, or to the risers 6 from 1 realobstruction to the passage of soot and the boiler to the radiating system of the smoke through the flue, but I provide a heater plant. which can be installed with considerably less Mounted within the chamber 3 in parallelexpense and labor than'the usual pipe coil lsm to the draftaxis of the flue is a plurality or radiator. Moreover, my heater may be of fiat heater units 7 in the form of water 10 used-with a hot water heater, steam heater, pockets spacedly connected to each other by vapor'heater or any ,other type of heating interfacial nipples 8, and provided with system having a water line. The requirestrengthening ribs9. ments of size for any particular type of plant With this construction, the exhaust gases is readily met by the capacity of my heater passlng through the flue connection from the 1m boiler are compelledto travel past the heating surfaces presented bythe plates 7, heating the waterwhich is circulated through said plates from the intake connection 4 and returning this Water in the form of very hot Water to the water compartment of the boiler itself, or to the risers from the boiler, thereby mingling with and increasing the heat of the Water delivered to the radiating system of the plant. In fact, experiments with this type of heater show that the water delivered by the supplemental heating unit has become heated far more quickly and far hotter than the water in the water compartment surrounding the fire box of the boiler itself. This results in a distinct economy in fuel consumption as well as a more instantaneous delivery of hot water to the circulating system of the heating plant. p

In the adaptation for steam boilers,-shown in Fig. 2, the steam boiler is indicated at 1 the flue connection at 2 the chamber of the heating unit at 3 the water connection from the water compartmentof'the steam boiler to the supplemental heating unit at 4 and the steam connection from said supplemental heater back to the steain boiler or to the risers at 5 The Water line of both the steam boiler and the heater unit'is marked at W in Fig. 2, and as in the form shown in Fig. l,the heater plates 7 are disposed in spaced parallel relation to each other and are interfacially connected to each other as shown.

' With this form, that part of the auxiliary heater above the water line and indicated by the numeral '10 in Fig. 2 functions as a steam chamber or dome within which the steam may expand before its return to the steam dome of the boiler. This results in an increased efliciency of the boiler itself in that the boiler may be more quickly brought to the steaming point.

In the hotwater type of Fig. 1, the ten-- dency of the heated gases passing along the flue is to rise and this creates a frictional passage along the underside of each plate due to the fact that the plates are disposed parallel to the draft axis and in a horizontal plane to theheating unit.

In the steam boiler installation shown in Fig. 2, the plates of the heating unit are disposed vertically but none the less in parallel- I ism, so'that an individual steam pocket or dome is created for each heating unit or section. This solves the problem of preventing the usual knocking action which results in the steam line due to the inability of 'the ordinary steam dome ofthe ordinary steam boiler to take care of the expansion quickly enough.

My heater may be adapted with little or no change of design to various other types of heating plants. Such adaptations and such changes in detail and design as come within the spirit and scope of my invention may all be resorted to within the limits of the appended claims.

What I therefore claim and desire to secure by Letters Patent is:

1. A heating unit for use with a boiler for delivering additional hot water or steam to the radiating system of the heating plant, comprising a chamber adapted to be disposed directly in the flue connection of the boiler, a plurality of fiat hollow castings enclosed within said chamber and spaced from. each I other and from the alls of the chamber and constituting Wat-er po ckets disposed in parallelism to each other and to the draft axis of the flue connection, said water pockets 'interfacially connected to each other and connected to the circulating system of the heating plant.

2. A heatingunit for use with a boiler for delivering additional hot Water or steam to the radiating system of the heating plant,

comprising a chamber adapted to be disposeddirectly in the flue connection of the boiler,

a plurality of flat hollow castings enclosed within said chamber and spaced from each other and from the walls of the chamber and constituting water pockets disposed in parallelism to each other and to the draft axis of the flue'connection, said water pockets interfacially connected to each other and connected to the circulating system of the heating plant and a plurality of vertically disposed strengthening ribs arranged within each of said pockets and extending longitudinally thereof in spaced parallel relation 100 to each other.

In testimony whereof I afiix my signature.

ROBERT PARSONS KING. 

